ICD-10-CM Code Also Notes · Chapter 21 · FY 2027 Z00-Z99

Code Also Notes in Chapter 21: Factors influencing health status and contact with health services ICD-10-CM

A Code Also note means two codes may be needed to fully describe a condition; it gives no sequencing direction. In Chapter 21 (Z00-Z99), notes printed in the chapter name other codes 43 times, and Code Also Notes anywhere in the Tabular List name the chapter’s codes 26 times, covering 20 distinct codes, categories and ranges. Switch views to read the list either way.

✓ From the official FY 2027 ICD-10-CM Tabular ListDefinitions follow the Official Guidelines, Section I.A
43
References in Its Notes
26
References to Its Codes
20
Chapter Codes Named
Z00-Z99
Chapter 21
Chapter 21

Code Also Notes by the code that carries the note

24 of 24 shown
  • Z15.1 Genetic susceptibility to epilepsy and neurodevelopmental disorders
    • developmental and epileptic encephalopathy (G93.45)
    • developmental disorder of speech and language (F80.-)
    • developmental disorders of scholastic skills (F81.-)
    • epilepsy, by specific type (G40.-)
    • intellectual disabilities (F70-F79)
    • other neurodevelopmental disorder (F88)
    • pervasive developmental disorders (F84.-)
  • Z15.2 Genetic susceptibility to obesity
  • Z15.3 Genetic susceptibility to kidney disease
    • , if applicable, hypertension (I10-I1A)
  • Z23 Encounter for immunization
    • , if applicable, encounter for immunization safety counseling (Z71.85)
  • Z28 Immunization not carried out and underimmunization status applies to 17 codes
    • , if applicable, encounter for immunization safety counseling (Z71.85)
  • Z29.81 Encounter for HIV pre-exposure prophylaxis
    • contact with and (suspected) exposure to human immunodeficiency virus [HIV] (Z20.6)
    • high risk sexual behavior (Z72.5-)
  • Z49 Encounter for care involving renal dialysis applies to 4 codes
    • associated end stage renal disease (N18.6)
  • Z51.81 Encounter for therapeutic drug level monitoring
    • any long-term (current) drug therapy (Z79.-)
  • Z62.22 Institutional upbringing
    • , if applicable, child in welfare custody (Z62.21)
  • Z62.23 Child in custody of non-parental relative
    • , if applicable, child in welfare custody (Z62.21)
  • Z62.24 Child in custody of non-relative guardian
    • , if applicable, child in welfare custody (Z62.21)
  • Z62.8 Other specified problems related to upbringing applies to 18 codes
    • absence of family member (Z63.3-)
    • disappearance and death of family member (Z63.4)
    • disruption of family by separation and divorce (Z63.5)
    • other specified problems related to primary support group (Z63.8)
    • other stressful life events affecting family and household (Z63.7-)
  • Z71.84 Encounter for health counseling related to travel
    • , if applicable, encounter for immunization (Z23)
  • Z71.85 Encounter for immunization safety counseling
    • , if applicable, encounter for immunization (Z23)
    • , if applicable, immunization not carried out (Z28.-)
  • Z71.87 Encounter for pediatric-to-adult transition counseling
    • autism spectrum disorder (F84.0)
    • congenital malformations of the circulatory system (Q20-Q28)
    • cystic fibrosis (E84.-)
    • sickle-cell disorder (D57.-)
  • Block note Block Z77-Z99 Persons with potential health hazards related to family and personal history and certain conditions influencing health status applies to 567 codes
    • any follow-up examination (Z08-Z09)
  • Z79 Long term (current) drug therapy applies to 32 codes
    • any therapeutic drug level monitoring (Z51.81)
  • Z87.892 Personal history of anaphylaxis
    • allergy status to drugs, medicaments and biological substances (Z88.-)
    • allergy status, other than to drugs and biological substances (Z91.0-)
  • Z87.893 Personal history of gender detransition
    • personal history of sex reassignment (Z87.890-)
  • Z90.41 Acquired absence of pancreas applies to 2 codes
    • exocrine pancreatic insufficiency (K86.81)
  • Z91.1 Patient's noncompliance with medical treatment and regimen applies to 14 codes
    • , if applicable, to identify underdosing of specific drug (T36-T50 with final character 6)
  • Z91.11 Patient's noncompliance with dietary regimen applies to 3 codes
    • , if applicable, food insecurity (Z59.4-)
  • Z91.A1 Caregiver's noncompliance with patient's dietary regimen applies to 2 codes
    • , if applicable, food insecurity (Z59.4-)
  • Z91.B Personal risk factor of exposure to diethylstilbestrol

The first view lists notes printed in this chapter (a note on a category or block applies to every code beneath it). The second lists codes of this chapter named by Code Also Notes anywhere in the Tabular List, including notes in other chapters.

Questions About Code Also Notes

What does a Code Also note mean?

A Code Also note instructs that two codes may be required to fully describe a condition, but it does not give sequencing direction (Section I.A.17). The FY 2027 Tabular List has 689 of them; 495 name other codes, with 538 references to 349 distinct codes, categories and ranges.

Which code goes first with a Code Also note?

The note does not decide it. Sequencing depends on the circumstances of the encounter: normally the condition that is the main reason for the visit goes first.

Related References

ICD-10-CM Official GuidelinesICD-10-CM Code LookupICD-10-CM Codes ListCode Lists by Tag

Source: FY 2027 ICD-10-CM Tabular List (CMS and NCHS) and the ICD-10-CM Official Guidelines for Coding and Reporting FY 2027, Section I.A. ICD List is not affiliated with CMS or NCHS.